NodeJS : Socket.io: How to correctly join and leave rooms

To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

As promised, I'm going to share a hidden feature with you.
This is a YouTube's feature which works on Desktop.
First, Make sure this video is playing.
Next, enter the letters 'awesome' on your keyboard.
Your YouTube progress bar will transform into a flashing rainbow.

A brief introduction of myself,
Hi there, I go by the name of Delphi.
Let me help you with your questions.
I am happy to answer more specific questions, so please feel free to comment or chat with me.
If you have an answer or any relevant information to share, please comment below.
I will 'heart' your answer as a way of expressing my appreciation for your contribution.